Table 1 Number of chromophores in each compound category of HULIS-BrC and WI-BrC before (2015) and after (2019) the “coal-to-gas” conversion measure.

From: More water-soluble brown carbon after the residential “coal-to-gas” conversion measure in urban Beijing

 

2015 HULIS

2019 HULIS

2015 WISOC

2019 WISOC

CH (+)

  

564

512

CHO (−)

1970

2194

793

711

CHO (+)

1129

1362

1758

1699

CHN (+)

603

643

1811

1587

CHON (−)

2209

2499

1281

1101

CHON (+)

3643

4175

4881

4575

S-containing (−)

109

117

31

29

S-containing (+)

45

42

31

25

BrC ESI (−)

4288

4810

2105

1841

BrC ESI (+)

5420

6222

9045

8398

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